The guild bank is now live... however Blizzard did not make it cheap. There could be a total of 6 tabs (correct me if I'm wrong) for the bank with about 90+ slots each. 1st slot cost 100g, 2nd slot would be 250g, 3rd is some higher value of course, and etc...
With that being put into place, access to the bank is kind of funky. Although it tracks who takes out and who deposits, currently what is in place generally is all deposits (gold and items) are unlimited to most (I'd have to see what Kyron has set) guild members, withdrawals are available mainly to donors (gold) which could in turn help expand the guild bank.
Again I'd have to talk to Kyron and see what else he has put in place, but a re-org of guild rankings were made with his help and they are as follow:
Old -> New
High Templar ->
Sentinel -> Arbiter
Guardian -> Archon/Templar
Knight -> Corsair
Initiate -> Observer/Scout
Arbiter - Senior Officers; a lot more bank access (multiple donor... hopefully)
Archon - Seasoned Veteran; more bank access (donor)
Templar - Seasoned Veteran; limited bank access
Corsair - Regular; limited bank access
Observer - Regular but nactive for 2+ months; no bank access
Scout - noobie... still green to guild; no bank access
** this isn't finalized and corrections may be made to this access list